Get table Schema

   

using System;
using System.Data;
using System.Data.SqlClient;

   class SchemaTable
   {
      static void Main(string[] args)
      {
         string connString = "server=(local)SQLEXPRESS;database=MyDatabase;Integrated Security=SSPI";
         string sql = @"select * from employee";
         SqlConnection conn = new SqlConnection(connString);

         try {
            conn.Open();
            SqlCommand cmd = new SqlCommand(sql, conn);
            SqlDataReader reader = cmd.ExecuteReader();

            DataTable schema = reader.GetSchemaTable();

            foreach (DataRow row in schema.Rows)
            { 
               foreach (DataColumn col in schema.Columns){
                  Console.WriteLine(col.ColumnName + " = " + row[col]);
                  Console.WriteLine("Null value allowed: " + col.AllowDBNull);
               }
            }
            reader.Close();
         } catch(Exception e) {
            Console.WriteLine("Error Occurred: " + e);
         } finally {
            conn.Close();
         }
      }  
   }